Starter Motors

EexcavaStart 50-55304A-1 12V 10T Starter Motor for Mercury Marine 100HP 110HP 125HP

Q: What numbers are documented for 50-55304A-1?

Primary Manufacturer Part Number: 50-55304A-1. Search Format Alias: 5055304A1. Interchange Reference: 50-45822. Interchange Reference: 50-58788. Interchange Reference: MOT3003. Interchange Reference: MOT3003E. Interchange Reference: 5374. Interchange Reference: 410-21108. Interchange Reference: 110648. Interchange Reference: 110649. Interchange Reference: 110652. Interchange Reference: 4-5602. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 50-55304A-1 before ordering?

Match the complete part number, compare the connector or mounting arrangement with your original unit and the recorded specifications, and confirm the machine or engine model and serial range. Send clear photos of the original unit when requesting a quote.

Packaging reference illustration for 50-55304A-1; not a product photograph

EexcavaStart packaging illustration · Not a photograph of this exact part. Exact-unit photo availability is not confirmed; send your original part number and unit photos with your inquiry.

OEM / reference50-55304A-1

Specification12V 10T CCW Starter Motor

Catalog ID51232699

Product Type: Starter Motor
Product Brand: EexcavaStart
Item Condition: Aftermarket Part
Unit Type: Starter
Voltage: 12
Rotation: CCW
Teeth: 10
Starter Type: DD
Fits: MERCURY MARINE
Image Disclosure: EexcavaStart labeled packaging placeholder; product photo pending

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Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.

Quotation details: MOQ, availability, lead time, item condition (new or remanufactured) and warranty coverage must be confirmed in your quotation before ordering.

Part-number relationships

Relationship	Reference family	Number
Primary Manufacturer Part Number	MERCURY MARINE	50-55304A-1
Search Format Alias	Formatting variant only	5055304A1
Cross-reference (fitment check required)	API MARINE	50-45822
Cross-reference (fitment check required)	API MARINE	50-58788
Cross-reference (fitment check required)	API MARINE	MOT3003
Cross-reference (fitment check required)	API MARINE	MOT3003E
Cross-reference (fitment check required)	ARCO MARINE	5374
Cross-reference (fitment check required)	ARROWHEAD	410-21108
Cross-reference (fitment check required)	CARGO	110648
Cross-reference (fitment check required)	CARGO	110649
Cross-reference (fitment check required)	CARGO	110652
Cross-reference (fitment check required)	EMP PARTS	4-5602
Cross-reference (fitment check required)	J&N Electrical Products	410-21000
Cross-reference (fitment check required)	JOHNSON ELECTRIC	0996340
Cross-reference (fitment check required)	LESTER	5295
Cross-reference (fitment check required)	LESTER	5296
Cross-reference (fitment check required)	LESTER	5299
Cross-reference (fitment check required)	LESTER	5733
Cross-reference (fitment check required)	MERCURY MARINE	50-31976
Cross-reference (fitment check required)	MERCURY MARINE	50-37274
Cross-reference (fitment check required)	MERCURY MARINE	50-45822
Cross-reference (fitment check required)	MERCURY MARINE	50-48643
Cross-reference (fitment check required)	MERCURY MARINE	50-58788
Cross-reference (fitment check required)	MERCURY MARINE	50-67341
Cross-reference (fitment check required)	PRESTOLITE	MGL4001
Cross-reference (fitment check required)	PRESTOLITE	MGL4001A
Cross-reference (fitment check required)	PRESTOLITE	MGL4001B
Cross-reference (fitment check required)	PRESTOLITE	MGL4006
Cross-reference (fitment check required)	PRESTOLITE	MGL4011
Cross-reference (fitment check required)	PRESTOLITE	MGL4012
Cross-reference (fitment check required)	PRESTOLITE	MGL4012A
Cross-reference (fitment check required)	PRESTOLITE	MGL4012B
Cross-reference (fitment check required)	SIERRA MARINE	18-5602
Cross-reference (fitment check required)	UNIPOINT	STR-1062
Cross-reference (fitment check required)	UNITED TECH	0262640-M030SM
Cross-reference (fitment check required)	UNITED TECH	0996340-M030SM
Cross-reference (fitment check required)	UNITED TECH	4840540-M030SM
Cross-reference (fitment check required)	UNITED TECH	SM02626
Cross-reference (fitment check required)	UNITED TECH	SM09963
Cross-reference (fitment check required)	UNITED TECH	SM48405
Cross-reference (fitment check required)	WAI	2-2077-UT
Cross-reference (fitment check required)	WAI	2-2157
Cross-reference (fitment check required)	WAI	5733N

Product fitment guide

Part numbers and compatible models

Quickly compare the reference number and recorded machine applications. Use photos of your original unit and the checklist before ordering.

Part identification

Reference numbers

Primary number

50-55304A-1

Formatting alias

5055304A1

Cross-reference (fitment check required)

50-45822
50-58788
MOT3003
MOT3003E
5374
410-21108
110648
110649
110652
4-5602
410-21000
0996340
5295
5296
5299
5733
50-31976
50-37274
50-48643
50-67341
MGL4001
MGL4001A
MGL4001B
MGL4006
MGL4011
MGL4012
MGL4012A
MGL4012B
18-5602
STR-1062
0262640-M030SM
0996340-M030SM
4840540-M030SM
SM02626
SM09963
SM48405
2-2077-UT
2-2157
5733N

Formatting aliases are the same number written differently. Cross-references require a specification and fitment check; they do not by themselves confirm direct interchangeability. Related assemblies and remanufactured numbers are separate relationship types.

Product summary

12V 10T CCW Starter Motor

Category: Starter Motors
Catalog ID: 51232699
Illustration views: 1

Before ordering

Confirm these details

Confirm voltage and power rating against the original starter nameplate.
Compare mounting-hole pattern, flange position and overall body orientation.
Confirm pinion tooth count and rotation where those values are specified.
Verify the engine model and machine serial range before ordering.

Machine fitment

Compatible model references

26 model references

Mercury Marine 100HP: Equipment type: Engine - Marine Outboard; Year: 1965
Mercury Marine 100HP: Equipment type: Engine - Marine Outboard; Year: 1969
Mercury Marine 110HP: Equipment type: Engine - Marine Outboard; Year: 1966
Mercury Marine 110HP: Equipment type: Engine - Marine Outboard; Year: 1967
Mercury Marine 125HP: Equipment type: Engine - Marine Outboard; Year: 1968
Mercury Marine 125HP: Equipment type: Engine - Marine Outboard; Year: 1969
Mercury Marine 55HP: Equipment type: Engine - Marine Outboard; Year: 1957
Mercury Marine 55HP: Equipment type: Engine - Marine Outboard; Year: 1958
Mercury Marine 55HP: Equipment type: Engine - Marine Outboard; Year: 1959
Mercury Marine 65HP: Equipment type: Engine - Marine Outboard; Year: 1965
Mercury Marine 65HP: Equipment type: Engine - Marine Outboard; Year: 1966
Mercury Marine 65HP: Equipment type: Engine - Marine Outboard; Year: 1967
Mercury Marine 65HP: Equipment type: Engine - Marine Outboard; Year: 1968
Mercury Marine 65HP: Equipment type: Engine - Marine Outboard; Year: 1969
Mercury Marine 65HP: Equipment type: Engine - Marine Outboard; Year: 1970
Mercury Marine 65HP: Equipment type: Engine - Marine Outboard; Year: 1971
Mercury Marine 80HP: Equipment type: Engine - Marine Outboard; Year: 1969
Mercury Marine 80HP: Equipment type: Engine - Marine Outboard; Year: 1970
Mercury Marine 80HP: Equipment type: Engine - Marine Outboard; Year: 1971
Mercury Marine 80HP: Equipment type: Engine - Marine Outboard; Year: 1972
Mercury Marine 85HP: Equipment type: Engine - Marine Outboard; Year: 1973
Mercury Marine 85HP: Equipment type: Engine - Marine Outboard; Year: 1974
Mercury Marine 85HP: Equipment type: Engine - Marine Outboard; Year: 1975
Mercury Marine 90HP: Equipment type: Engine - Marine Outboard; Year: 1965
Mercury Marine 95HP: Equipment type: Engine - Marine Outboard; Year: 1966
Mercury Marine 95HP: Equipment type: Engine - Marine Outboard; Year: 1967

Fitment / evidence notes

Fitment limitation: Confirm the original part number, electrical rating, pinion or pulley, terminals, mounting geometry and equipment serial range before ordering

Compatibility lists identify searchable model families, not every production serial range. Confirm the original part number and machine serial number before purchase.

Quick fitment answers

Common questions about 50-55304A-1

Which machines use 50-55304A-1?

Recorded compatible model references include Mercury Marine 100HP: Equipment type: Engine - Marine Outboard; Year: 1965, Mercury Marine 100HP: Equipment type: Engine - Marine Outboard; Year: 1969, Mercury Marine 110HP: Equipment type: Engine - Marine Outboard; Year: 1966, Mercury Marine 110HP: Equipment type: Engine - Marine Outboard; Year: 1967, Mercury Marine 125HP: Equipment type: Engine - Marine Outboard; Year: 1968, Mercury Marine 125HP: Equipment type: Engine - Marine Outboard; Year: 1969, Mercury Marine 55HP: Equipment type: Engine - Marine Outboard; Year: 1957, Mercury Marine 55HP: Equipment type: Engine - Marine Outboard; Year: 1958 and 18 additional models shown on this page. Recorded fitment/evidence notes: Fitment limitation: Confirm the original part number, electrical rating, pinion or pulley, terminals, mounting geometry and equipment serial range before ordering. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 50-55304A-1?

Cross-references are listed in the relationship table above. Compare specifications and the original unit before treating a reference as interchangeable. Formatting aliases for the same number: 5055304A1.

How do I confirm 50-55304A-1 before ordering?

Confirm voltage and power rating against the original starter nameplate. Compare mounting-hole pattern, flange position and overall body orientation. Confirm pinion tooth count and rotation where those values are specified. Send clear photos of the original unit and connector layout when requesting a quote.